Hull of water craft



NOV. 18, 1930. SCQTT-PAINE 1,782,320

' HULL OF WATER CRAFT Filed Oct. 15, 1929 Patented Nov. 18,1930

TE STAT mmnnxr scoT'r-PAInE, F soUTHAMrToivQEnG ND Horn OF-WATERQCRAEApplication filed October 15, 1929, serial No. 399,813; and in GreatBritain November 30, 1928." 1- r hulls iof motor boats,- hydroplanes andlike cra ft,'all hereinafter referred to as watervcraft,1 ,of the typeinwhich theghull has a stepped bottom. Heretofore such steps have beenincorporated in the construction of the hull. i v 9 According tothepresent invention there is provided a stepped structurewhich is sepa- 0rately constructed and is'removably secured to the hull. It is animportant advantageof this arrangement that the step'can be readilyreplaced if damaged. Furthermore, any damage which is confined to thestep does not interfere with the seaworthinessof the craft so that itssafety is very greatly enhanced.

In some cases the hull may be constructed with a permanent step in'it,.bu't thisstep is situated forward of the desired position for 20, thestep, and an additional partial step structure as above described issecured to the hull adj oining the permanent stepstructure'tlms forminga removable section of the complete step. With. this arrangement thechangeability of the after end of astep on a hull toimprove theperformance of the craft is easily effected, and it enables anyalteratlon of step design to bequickly and. cheaply car ried out.-

i :m Convenientlythe step structure isgformed 40 ward and partlyinsection ofa motor boat with the invention applied thereto, V .Figure 2is a side elevation partlyin section,and m Figure 3 is an underside plandrawn'to a -!5 reduced scale; I c c In the embodiment shown in thedrawings,

the bottom of the hulllO is constructed with a permanent step 11incorporated therein.

This permanent step is situatedforward of 50 the desired positionyforthe after end of the lhis invention is for improvements in the.

the beams 15 are arranged longitudinally of but the lower wall 1 4.ofsaidgstep structure 7 centre line of the boat 1 e (km/W114'notessential'andmay e-omittedleaving an step, and an additional partialstep struciv ture indicatedas awhole by the reference numeral 12, isremovably secured to thebottom of thehull adjoining the permanentstepll.

This additional step structure is a aself-con- 65, tained unit andcomprises upper and lower .walls 13, 14 which are spacedapart by anumber of beams 15, together withside and end walls 16,l7.respectively,'. Inthe drawings the boat. but they may be arrangedtransversely thereof if desiredsu The unitary structure thus formed isdetachably secured .to the bottom of the,hull by means of bolts 18passing through holes provided therefor 16 ,in the longitudinalbeams Theupper Wall 13 ofthe removable step structure may .befoiuned by a singlelayer of planks as thisi wall abutsagainst thebottom 19 of the hull,

is preferably formed byltwo layers of planks fsecured to bearers 20, asshown-in Figures 1 ,and2 in order to give the necessary strength. Ifdesired, the upperwall-lS of the step struc ture may be omitted. IThelafter nd walls 17 ofthe removable step are inclined respectivelyfroInfl the sides of the hull towardsthe I, centre as "clearly-shown. inF igure 3.: These I end wallsmay beat any desired inclination, u ev n;at right angles, to ithe; fore and: aft

LIfQlfBOVl', they are open-ended structure.

. It will be appreciated that by means of this invention theconstruction of the hull is I simplified and very greatly strengthened,and its cost reducedw Moreover, step structures, for v instancehavingdifferently incllned end walls 17, can be lnterchangeablyv securedto thehull at will. Although in thel specific embodiment of the inventionillustrated in the drawings a partial step structure is shown ad o1n1nga permanent step,'it

'isto be understood that if desired the whole I V of the step may beremovably secured to the 7 hull in the manner described abovel andsuchia constructionis included within the scope of 7 I i the invention. 7 v VI claim':''

A step structure'for watercraft ofthe? 7 type wherein the hull has astepped bottom, comprising a lower wall spacedfrom the hull by a numberof beams side walls ar ranged'to form with the lower wall and said 5beams a unitary structure, and anumber of tom.

bolts passing through holes in said beams for detachably securingsaidunitary structure tothe bottom ofthe hull.

2. In watercraft of the type which has a stepped hull-bottom, astepstructure separately constructed as aboX-like unit and shaped on theside coming into contact with the hull-bottom to the configuration ofsaid hull-bottom and means whereby said unit can be detachably securedto said hull-bot 3. Vatercraft comprising in combination a hull having astep-structure forming a permanent part of the hull-bottom, a stepstructure separately constructed as a box-like unit and shaped on theside'coming into contact with the ,hul-l bottom to the configuration 7thereof andmeans whereby said unit can be detachably secured to saidhull bottom.

7 4L Vvatercraft comprising in combination a hull having astep-structure forming a permanent part of the hull-bottom, astep-structure separatelyconstructed as aboX-likeunit and adapted toform an extension of the per manent step and shaped on ;the side cominginto contact with the hull-bottomto the configuration thereof andmeanswhereby said i 3 unit can be detachably secured to said hullbottom. 7

' 5. ,A step-structure for watercraft where'- in the hull has astepped-bottorn comprising in combination a lower wallspaced-from thehull by a numberof beams, sidewalls ar- ,ra-ngedto form withthe lowerwall and said beam unitary structure, anen d wall closing the outer endof the structure andbolts pass ng through holes in said beamsifordetachably securing said u'nit ar structure to theubottom ofthehlill; A

' "In-testimony whereof -I aflixzmy signature.

: 1:HUBERTseorrPAINE;

